Ever wondered how to control the number of emails Amazon sends you? Not only transactional ones but promotional spam too. I tried, and I was impressed with the effort Amazon has gone to so that I can control the emails I receive. See how it works.

Here are 20 famous logos renowned for their multi-faceted designs – through use of negative space or through self-referential iconic suggestion. Great logos work on multiple levels. These are just some of my favourites.